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The smolt count

The smolt count

The most laborious part of the Index project is the smolt count that takes place at Ekeberg. It is also the most fun as here we see the results of the conservation work.

Migration control is performed through the use of a smolt wheel. Smolt that are caught are subdued, measured, weighed and tagged. Some scale tests are also taken to determine the age of the fish and to map the dna for genetic research.  The tagged fish are then transported upstream for release. By mapping the number of these fish that are caught in relation to the released amount we receive an estimate as regards the effectiveness of the smolt wheel and also a number for the rivers total smolt production. Recaptured salmon and sea trout are always released downstream of the wheel. Even other species caught are registered but then immediately released downstream of the wheel.

Henric Persson

Responsible research and fish conservation

Phone: +46 454 50123 +46 454 50123

Send mail to Henric